# Copyright 2011 Alexey V Michurin <a.michurin@gmail.com>. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are
# permitted provided that the following conditions are met:
#
#    1. Redistributions of source code must retain the above copyright notice, this list of
#       conditions and the following disclaimer.
#
#    2. Redistributions in binary form must reproduce the above copyright notice, this list
#       of conditions and the following disclaimer in the documentation and/or other materials
#       provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY Alexey V Michurin ''AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Alexey V Michurin OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are those of the
# authors and should not be interpreted as representing official policies, either expressed
# or implied, of Alexey V Michurin.

__all__ = 'blowfish'

__doc__ = '''Blowfish implementation

Block size: 64 bits
Key size: 32, 64, 96, 128, ..., 448 bits

Example:
from ska.bf import blowfish
cipher = blowfish('pass') # 32 bits
e = cipher.enc('texttext') # 64 bits
d = cipher.dec(e)
print repr(d)
'''

# constants

P_BOXES = [
    0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
    0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
    0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
    0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
    0x9216d5d9, 0x8979fb1b]

S_BOXES = [
    [
    0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
    0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
    0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
    0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
    0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
    0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
    0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
    0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
    0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
    0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
    0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
    0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
    0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
    0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
    0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
    0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
    0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
    0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
    0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
    0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
    0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
    0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
    0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
    0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
    0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
    0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
    0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
    0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
    0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
    0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
    0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
    0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
    0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
    0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
    0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
    0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
    0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
    0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
    0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
    0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
    0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
    0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
    0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
    0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
    0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
    0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
    0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
    0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
    0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
    0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
    0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
    0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
    0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
    0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
    0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
    0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
    0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
    0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
    0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
    0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
    0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
    0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
    0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
    0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a
    ],
    [
    0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
    0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
    0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
    0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
    0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
    0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
    0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
    0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
    0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
    0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
    0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
    0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
    0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
    0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
    0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
    0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
    0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
    0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
    0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
    0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
    0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
    0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
    0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
    0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
    0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
    0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
    0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
    0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
    0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
    0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
    0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
    0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
    0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
    0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
    0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
    0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
    0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
    0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
    0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
    0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
    0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
    0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
    0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
    0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
    0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
    0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
    0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
    0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
    0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
    0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
    0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
    0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
    0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
    0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
    0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
    0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
    0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
    0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
    0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
    0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
    0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
    0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
    0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
    0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7
    ],
    [
    0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
    0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
    0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
    0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
    0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
    0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
    0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
    0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
    0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
    0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
    0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
    0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
    0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
    0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
    0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
    0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
    0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
    0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
    0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
    0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
    0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
    0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
    0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
    0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
    0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
    0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
    0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
    0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
    0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
    0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
    0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
    0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
    0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
    0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
    0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
    0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
    0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
    0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
    0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
    0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
    0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
    0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
    0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
    0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
    0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
    0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
    0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
    0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
    0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
    0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
    0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
    0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
    0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
    0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
    0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
    0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
    0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
    0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
    0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
    0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
    0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
    0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
    0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
    0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0
    ],
    [
    0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
    0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
    0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
    0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
    0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
    0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
    0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
    0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
    0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
    0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
    0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
    0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
    0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
    0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
    0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
    0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
    0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
    0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
    0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
    0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
    0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
    0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
    0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
    0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
    0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
    0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
    0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
    0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
    0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
    0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
    0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
    0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
    0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
    0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
    0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
    0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
    0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
    0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
    0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
    0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
    0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
    0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
    0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
    0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
    0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
    0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
    0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
    0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
    0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
    0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
    0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
    0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
    0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
    0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
    0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
    0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
    0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
    0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
    0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
    0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
    0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
    0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
    0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
    0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
    ]]

# cipher

def cipher(l, r, pb, sb):
    for p in pb[:-2]:
        q = r
        r = l ^ p
        l = q ^ ((((sb[0][(r >> 24) & 0xff] + sb[1][(r >> 16) & 0xff]) ^
                sb[2][(r >> 8) & 0xff]) + sb[3][r & 0xff]) & 0xffffffff)
    return r ^ pb[-1], l ^ pb[-2]

def perpare_boxes(key):
    klen = len(key)
    k = map(ord, key)
    i = 0
    pb = []
    for x in P_BOXES:
        v = 0
        for _ in xrange(4):
            v <<= 8
            v += k[i]
            i = (i+1) % klen
        pb.append(x ^ v)
    l = 0
    r = 0
    for i in xrange(0, len(pb), 2):
        l, r = cipher (l, r, pb, S_BOXES)
        pb[i] = l
        pb[i + 1] = r
    sb = map(lambda x: x[:], S_BOXES)
    for i in xrange(len(sb)):
        for j in xrange(0, len(sb[i]), 2):
            l, r = cipher(l, r, pb, sb)
            sb[i][j] = l
            sb[i][j + 1] = r
    return pb, sb

# util

def text_to_num(t):
    a = map(ord, t)
    v = 0
    for b in a:
        v <<= 8
        v += b
    return v

def text_to_pair(t):
    return text_to_num(t[:4]), text_to_num(t[4:])

def num_to_text(n):
    s = ''
    for _ in xrange(4):
        s = chr(n & 0xff) + s
        n >>= 8
    return s

def pair_to_text(a, b):
    return num_to_text(a) + num_to_text(b)

# interface

class blowfish:

    def __init__(self, key):
        self.pb, self.sb = perpare_boxes(key)
        self.rpb = tuple(reversed(self.pb))

    def __cipher(self, pb, text):
        p, q = text_to_pair(text)
        a, b = cipher(p, q, pb, self.sb)
        return pair_to_text(a, b)

    def enc(self, text):
        return self.__cipher(self.pb, text)

    def dec(self, text):
        return self.__cipher(self.rpb, text)

# tests

if __name__ == '__main__':
    from testutil import qrepr, ok
    # control data from Blowfish homepage
    # http://www.schneier.com/code/vectors.txt
    # Test vectors and hi-level interface
    for k, t, e in (
        ('\x00\x00\x00\x00\x00\x00\x00\x00',
         '\x00\x00\x00\x00\x00\x00\x00\x00',
         '\x4e\xf9\x97\x45\x61\x98\xdd\x78'),
        ('\xff\xff\xff\xff\xff\xff\xff\xff',
         '\xff\xff\xff\xff\xff\xff\xff\xff',
         '\x51\x86\x6f\xd5\xb8\x5e\xcb\x8a'),
        ('\x30\x00\x00\x00\x00\x00\x00\x00',
         '\x10\x00\x00\x00\x00\x00\x00\x01',
         '\x7d\x85\x6f\x9a\x61\x30\x63\xf2'),
        ('\x11\x11\x11\x11\x11\x11\x11\x11',
         '\x11\x11\x11\x11\x11\x11\x11\x11',
         '\x24\x66\xdd\x87\x8b\x96\x3c\x9d'),
        ('\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\x11\x11\x11\x11\x11\x11\x11\x11',
         '\x61\xf9\xc3\x80\x22\x81\xb0\x96'),
        ('\x11\x11\x11\x11\x11\x11\x11\x11',
         '\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\x7d\x0c\xc6\x30\xaf\xda\x1e\xc7'),
        ('\x00\x00\x00\x00\x00\x00\x00\x00',
         '\x00\x00\x00\x00\x00\x00\x00\x00',
         '\x4e\xf9\x97\x45\x61\x98\xdd\x78'),
        ('\xfe\xdc\xba\x98\x76\x54\x32\x10',
         '\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\x0a\xce\xab\x0f\xc6\xa0\xa2\x8d'),
        ('\x7c\xa1\x10\x45\x4a\x1a\x6e\x57',
         '\x01\xa1\xd6\xd0\x39\x77\x67\x42',
         '\x59\xc6\x82\x45\xeb\x05\x28\x2b'),
        ('\x01\x31\xd9\x61\x9d\xc1\x37\x6e',
         '\x5c\xd5\x4c\xa8\x3d\xef\x57\xda',
         '\xb1\xb8\xcc\x0b\x25\x0f\x09\xa0'),
        ('\x07\xa1\x13\x3e\x4a\x0b\x26\x86',
         '\x02\x48\xd4\x38\x06\xf6\x71\x72',
         '\x17\x30\xe5\x77\x8b\xea\x1d\xa4'),
        ('\x38\x49\x67\x4c\x26\x02\x31\x9e',
         '\x51\x45\x4b\x58\x2d\xdf\x44\x0a',
         '\xa2\x5e\x78\x56\xcf\x26\x51\xeb'),
        ('\x04\xb9\x15\xba\x43\xfe\xb5\xb6',
         '\x42\xfd\x44\x30\x59\x57\x7f\xa2',
         '\x35\x38\x82\xb1\x09\xce\x8f\x1a'),
        ('\x01\x13\xb9\x70\xfd\x34\xf2\xce',
         '\x05\x9b\x5e\x08\x51\xcf\x14\x3a',
         '\x48\xf4\xd0\x88\x4c\x37\x99\x18'),
        ('\x01\x70\xf1\x75\x46\x8f\xb5\xe6',
         '\x07\x56\xd8\xe0\x77\x47\x61\xd2',
         '\x43\x21\x93\xb7\x89\x51\xfc\x98'),
        ('\x43\x29\x7f\xad\x38\xe3\x73\xfe',
         '\x76\x25\x14\xb8\x29\xbf\x48\x6a',
         '\x13\xf0\x41\x54\xd6\x9d\x1a\xe5'),
        ('\x07\xa7\x13\x70\x45\xda\x2a\x16',
         '\x3b\xdd\x11\x90\x49\x37\x28\x02',
         '\x2e\xed\xda\x93\xff\xd3\x9c\x79'),
        ('\x04\x68\x91\x04\xc2\xfd\x3b\x2f',
         '\x26\x95\x5f\x68\x35\xaf\x60\x9a',
         '\xd8\x87\xe0\x39\x3c\x2d\xa6\xe3'),
        ('\x37\xd0\x6b\xb5\x16\xcb\x75\x46',
         '\x16\x4d\x5e\x40\x4f\x27\x52\x32',
         '\x5f\x99\xd0\x4f\x5b\x16\x39\x69'),
        ('\x1f\x08\x26\x0d\x1a\xc2\x46\x5e',
         '\x6b\x05\x6e\x18\x75\x9f\x5c\xca',
         '\x4a\x05\x7a\x3b\x24\xd3\x97\x7b'),
        ('\x58\x40\x23\x64\x1a\xba\x61\x76',
         '\x00\x4b\xd6\xef\x09\x17\x60\x62',
         '\x45\x20\x31\xc1\xe4\xfa\xda\x8e'),
        ('\x02\x58\x16\x16\x46\x29\xb0\x07',
         '\x48\x0d\x39\x00\x6e\xe7\x62\xf2',
         '\x75\x55\xae\x39\xf5\x9b\x87\xbd'),
        ('\x49\x79\x3e\xbc\x79\xb3\x25\x8f',
         '\x43\x75\x40\xc8\x69\x8f\x3c\xfa',
         '\x53\xc5\x5f\x9c\xb4\x9f\xc0\x19'),
        ('\x4f\xb0\x5e\x15\x15\xab\x73\xa7',
         '\x07\x2d\x43\xa0\x77\x07\x52\x92',
         '\x7a\x8e\x7b\xfa\x93\x7e\x89\xa3'),
        ('\x49\xe9\x5d\x6d\x4c\xa2\x29\xbf',
         '\x02\xfe\x55\x77\x81\x17\xf1\x2a',
         '\xcf\x9c\x5d\x7a\x49\x86\xad\xb5'),
        ('\x01\x83\x10\xdc\x40\x9b\x26\xd6',
         '\x1d\x9d\x5c\x50\x18\xf7\x28\xc2',
         '\xd1\xab\xb2\x90\x65\x8b\xc7\x78'),
        ('\x1c\x58\x7f\x1c\x13\x92\x4f\xef',
         '\x30\x55\x32\x28\x6d\x6f\x29\x5a',
         '\x55\xcb\x37\x74\xd1\x3e\xf2\x01'),
        ('\x01\x01\x01\x01\x01\x01\x01\x01',
         '\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\xfa\x34\xec\x48\x47\xb2\x68\xb2'),
        ('\x1f\x1f\x1f\x1f\x0e\x0e\x0e\x0e',
         '\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\xa7\x90\x79\x51\x08\xea\x3c\xae'),
        ('\xe0\xfe\xe0\xfe\xf1\xfe\xf1\xfe',
         '\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\xc3\x9e\x07\x2d\x9f\xac\x63\x1d'),
        ('\x00\x00\x00\x00\x00\x00\x00\x00',
         '\xff\xff\xff\xff\xff\xff\xff\xff',
         '\x01\x49\x33\xe0\xcd\xaf\xf6\xe4'),
        ('\xff\xff\xff\xff\xff\xff\xff\xff',
         '\x00\x00\x00\x00\x00\x00\x00\x00',
         '\xf2\x1e\x9a\x77\xb7\x1c\x49\xbc'),
        ('\x01\x23\x45\x67\x89\xab\xcd\xef',
         '\x00\x00\x00\x00\x00\x00\x00\x00',
         '\x24\x59\x46\x88\x57\x54\x36\x9a'),
        ('\xfe\xdc\xba\x98\x76\x54\x32\x10',
         '\xff\xff\xff\xff\xff\xff\xff\xff',
         '\x6b\x5c\x5a\x9c\x5d\x9e\x0a\x5a'),):
        c = blowfish(k)
        ee = c.enc(t)
        tt = c.dec(ee)
        print qrepr(e), qrepr(ee), ok(e == ee)
        print qrepr(t), qrepr(tt), ok(t == tt)
    # Test keys and low-level interface
    kk = '\xf0\xe1\xd2\xc3\xb4\xa5\x96\x87\x78\x69\x5a\x4b\x3c\x2d\x1e\x0f\x00\x11\x22\x33\x44\x55\x66\x77'
    p, q = text_to_pair('\xfe\xdc\xba\x98\x76\x54\x32\x10')
    for l, e in zip(xrange(1, 25), (
        '\xf9\xad\x59\x7c\x49\xdb\x00\x5e',
        '\xe9\x1d\x21\xc1\xd9\x61\xa6\xd6',
        '\xe9\xc2\xb7\x0a\x1b\xc6\x5c\xf3',
        '\xbe\x1e\x63\x94\x08\x64\x0f\x05',
        '\xb3\x9e\x44\x48\x1b\xdb\x1e\x6e',
        '\x94\x57\xaa\x83\xb1\x92\x8c\x0d',
        '\x8b\xb7\x70\x32\xf9\x60\x62\x9d',
        '\xe8\x7a\x24\x4e\x2c\xc8\x5e\x82',
        '\x15\x75\x0e\x7a\x4f\x4e\xc5\x77',
        '\x12\x2b\xa7\x0b\x3a\xb6\x4a\xe0',
        '\x3a\x83\x3c\x9a\xff\xc5\x37\xf6',
        '\x94\x09\xda\x87\xa9\x0f\x6b\xf2',
        '\x88\x4f\x80\x62\x50\x60\xb8\xb4',
        '\x1f\x85\x03\x1c\x19\xe1\x19\x68',
        '\x79\xd9\x37\x3a\x71\x4c\xa3\x4f',
        '\x93\x14\x28\x87\xee\x3b\xe1\x5c',
        '\x03\x42\x9e\x83\x8c\xe2\xd1\x4b',
        '\xa4\x29\x9e\x27\x46\x9f\xf6\x7b',
        '\xaf\xd5\xae\xd1\xc1\xbc\x96\xa8',
        '\x10\x85\x1c\x0e\x38\x58\xda\x9f',
        '\xe6\xf5\x1e\xd7\x9b\x9d\xb2\x1f',
        '\x64\xa6\xe1\x4a\xfd\x36\xb4\x6f',
        '\x80\xc7\xd7\xd4\x5a\x54\x79\xad',
        '\x05\x04\x4b\x62\xfa\x52\xd0\x80',
        )):
        k = kk[:l]
        pb, sb = perpare_boxes(k)
        a, b = cipher(p, q, pb, sb)
        ee = pair_to_text(a, b)
        print qrepr(e), qrepr(ee), ok(e == ee)
